Here, the first argument is the name of the property, and the second argument is the class of
the Bean.
// A Bean information class.
import java.beans.*;
public class ColorsBeanInfo extends SimpleBeanInfo {
public PropertyDescriptor[] getPropertyDescriptors() {
try {
PropertyDescriptor rectangular = new
PropertyDescriptor("rectangular", Colors.class);
PropertyDescriptor pd[] = {rectangular};
return pd;
}
catch(Exception e) {
System.out.println("Exception caught. " + e);
}
return null;
}
}
The final class is called IntrospectorDemo. It uses introspection to display the properties
and events that are available within the Colors Bean.
// Show properties and events.
import java.awt.*;
import java.beans.*;
public class IntrospectorDemo {
public static void main(String args[]) {
try {
Class c = Class.forName("Colors");
BeanInfo beanInfo = Introspector.getBeanInfo(c);
System.out.println("Properties:");
PropertyDescriptor propertyDescriptor[] =
beanInfo.getPropertyDescriptors();
for(int i = 0; i < propertyDescriptor.length; i++) {
System.out.println("\t" + propertyDescriptor[i].getName());
}
System.out.println("Events:");
EventSetDescriptor eventSetDescriptor[] =
beanInfo.getEventSetDescriptors();
for(int i = 0; i < eventSetDescriptor.length; i++) {
System.out.println("\t" + eventSetDescriptor[i].getName());
}
}
catch(Exception e) {
System.out.println("Exception caught. " + e);
}
}
}
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